High voltage generator for electrostatic painting equipment

Abstract

A generator is provided inside equipment, such as a sprayer, having a high voltage cascade including a voltage-gain transformer and a voltage multiplier arranged at the output of the transformer. The transformer is a double or multiple transformer, including at least two elementary transformers, whereof respective primary windings are mounted electrically in parallel, and whereof respective secondary windings are mounted electrically in series, the arrangement reducing a diameter of the cascade to facilitate incorporation in the sprayer or other equipment. The invention is applicable to painting robots for the automotive industry.

1. A high voltage generator for electrostatic painting equipment comprising: a high voltage cascade housed inside the equipment including a voltage booster transformer and a voltage booster multiplier placed at an output of the transformer, wherein said transformer comprises at least two elementary transformers having respective primary windings mounted electrically in parallel and respective secondary windings mounted electrically in series, the series mounting of the secondary windings providing an output voltage, the sum of the voltages across terminals of each of the secondary windings, which is an input voltage of the voltage multiplier, and
 wherein the two or more elementary transformers are arranged coaxially, following one another, in such a way that a maximum diameter or a maximum cross section of the “cascade” is not greater than a diameter or a cross section of each elementary transformer. 
 
   
   
     2. The high voltage generator as claimed in  claim 1 , wherein each elementary transformer is a transformer of substantially cylindrical outside shape, with a pot-shaped ferrite part, ensuring magnetic flux closure. 
   
   
     3. The high voltage generator as claimed in  claim 1 , wherein a high voltage side connection of the generator is effected through an arrangement of baffles, making it possible to lengthen an insulation distance of the high voltage with respect to ground. 
   
   
     4. The high voltage generator as claimed in  claim 1 , wherein the painting equipment is an electrostatic paint sprayer carried by a painting robot.